Considering a rare X - linked recessive trait, which of the statements is/are true?

A. An unaffected father is expected to have unaffected daughters.
B. An affected mother is expected to have affected sons.
C. An affected father is expected to have affected daughters.
D. An unaffected woman whose father was affected is expected to have unaffected sons.
E. Both parents have to be affected in order to have affected daughters.